内燃机瞬时转速测量干扰因素分类与仿真

Classification and simulation of interference factors in the measurement of ICE transient speed

将影响内燃机瞬时转速测量的因素分为调频、调幅和附加波形影响,并得到了在这些干扰下磁电式传感器输出电压波形的理论函数表达式;使用插值计数法分别对3类因素的影响进行了仿真,结果证明了附加波形对瞬时转速测量计算的影响最大,调频干扰次之,调幅干扰对其几乎没有影响.

In this paper, the factors influencing ICE transient speed measurement are classified into three groups that are frequency modulation, amplitude modulation and additional waves, and the function expressions of magnetoelectric sensor′s output voltage waves under influence of the abovementioned three factors are derived. The interpolation counting method is used in simulation of interference factors in measurement, and the results show that the additional waves have the greatest influence on transient speed measurement, the frequency modulation has a less influence, and the amplitude modulation has nearly no influence.